HOFFMAN ESTATES, Ill. (STMW) — Sears Holdings Corp. is closing a St. Charles store and laying off workers, making the retailer one of six Illinois companies planning a total of 505 job cuts in coming months.

The payroll-trimming details were released Thursday by the Department of Commerce and Economic Opportunity as part of its monthly Worker Adjustment and Retraining Notification, or WARN, Act. Businesses with more than 75 full-time employees in Illinois are required by law to provide 60 days advance notice to the state of layoffs or plant closings.

Hoffman Estates-based Sears closed a department store in St. Charles in March, a move that affected 78 workers. The closing had been announced in January after the retail chain decided not to renew its lease.

Sears wasn’t the only department store trimming operations: J. C. Penney Co. of Plano, Texas, said it will close its store at Springhill Mall in West Dundee in June. That will leave 139 employees without jobs.

Marcal Chicago LLC will begin shutting down its Chicago manufacturing plant at 5401 S. Western Blvd. at the end of May. By the time the plant is closed in September, a total of 52 jobs will be lost. The Chicago operation was sold last year to Packaging Dynamics Corp., which is owned by New York-based private-equity firm Kohlberg & Co. LLC.